What I did: Created a train with a schedule of "S, leave on circuit condition G >0", "W, wait 0 seconds", "Extra, wait 0 seconds". I then disabled all instances of the W station.
What happened: The train sits there going "no path" (see attached screenshots) after arriving at a station named S.
What I expected to happen: In 0.16 this would have resulted in the train skipping the disabled station in its schedule, and in this case just doing a route from "S" to "W".